A portable energy saving electric fan and its method of use

Abstract

This invention relates to the field of centrifugal fans, specifically disclosing a portable energy-saving electric fan and its usage method. The fan includes a housing with a grille and a fan installed inside the housing. The fan's outlet is aligned with the grille. The top of the housing has an opening through which the fan can extend. The fan's outer casing is divided into a fixed part and at least one movable part. The movable part is movable relative to the fixed part. When the movable and fixed parts are separated, maintenance tools can be inserted into the casing to inspect the inner wall and impeller. This invention allows the fan to be lifted from the housing for easy maintenance. Furthermore, the fan's outer casing can be divided into a fixed part and at least one movable part, and the fixed and movable parts can be fixed to the fixed part without connecting parts, only by a retaining element inside the housing, facilitating maintenance and return to its original position after maintenance.

Description

Technical Field

[0001] This invention relates to the field of centrifugal fan technology, and more particularly to a portable energy-saving electric fan and its usage method. Background Technology

[0002] In some large event venues (such as concerts, exhibitions, etc.), fans are needed to circulate the air in order to achieve ventilation and prevent the spread of bacteria, especially for ventilating portable toilets.

[0003] Existing fans consist of a motor and blades, which disperse the airflow from all sides and result in weak airflow, making it difficult to achieve effective air circulation and thus unable to provide adequate ventilation for the aforementioned locations.

[0004] There are also some devices on the market that use other types of blowers, such as centrifugal blowers, as the air source. For example, the prior art announcement CN220929706U discloses a suspended centrifugal blower, which includes a blower body, a thrust assembly, and an air-cooling system. The thrust assembly includes a thrust mounting plate, an outer thrust bearing, a thrust disc, an inner thrust bearing, and an inner thrust bearing seat arranged sequentially from front to back; there is a receiving space between the inner thrust bearing and the outer thrust bearing; the air-cooling system includes an air-cooling pipe, a first air-cooling channel, and a return pipe; the air-cooling pipe is connected to the inner cavity of the ventilation and cooling end shell; the first air-cooling channel is connected to the ventilation and cooling pipe and the receiving space; the return pipe connects the receiving space and the inner cavity of the volute. The suspended centrifugal blower provided by this utility model cools the bearings and shaft by separately introducing clean air into the inner cavity of the blower body and the receiving space between the inner and outer thrust bearings.

[0005] However, if the existing technology is applied to the above-mentioned locations, the wind force is too concentrated, people will feel a strong sense of discomfort when passing by, and the noise is loud. Furthermore, goods cannot be stacked on it when moving, the overall mobility is slightly insufficient, and the convenience of maintenance also needs to be improved. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] This invention provides a portable energy-saving electric fan and its usage method, which solves the problems of existing technology: "the wind force is too concentrated, causing strong discomfort when people pass by, and the noise is loud. Furthermore, goods cannot be stacked on it when moving, resulting in slightly insufficient overall mobility, and the convenience of maintenance also needs to be improved." The specific solution is as follows: On one hand, the present invention provides a portable energy-saving electric fan, including a housing with a grille and a fan installed inside the housing. The air outlet of the fan is aligned with the grille. The top of the housing has an opening through which the fan can extend out of the housing. The outer casing of the fan is divided into a fixed part and at least one movable part. The movable part can be displaced relative to the fixed part. When the movable part and the fixed part are separated, maintenance tools can be inserted into the housing to inspect the inner wall of the housing and the impeller. The housing has a blocking member. When the fan is completely inside the housing, the blocking member can fix the movable part and the fixed part relative to each other, preventing the movable part from displacing relative to the fixed part.

[0008] Preferably, a slider is fixedly connected to one end of the movable part near the fixed part, and a groove is provided on the fixed part corresponding to the slider, and the slider is slidably connected to the groove.

[0009] Preferably, the movable part is located on the upper side of the housing near the air inlet.

[0010] Preferably, the slider slides along the axis of the impeller.

[0011] Preferably, the slider slides along the open direction of the box.

[0012] Preferably, the slider slides obliquely upwards and outwards along the open opening of the housing.

[0013] Preferably, an air guide hood is provided inside the housing on one side of the grille. The cross-sectional area of ​​the air guide hood increases towards the grille, and the shape of the end closer to the grille matches the grille, while the shape of the end farther from the grille matches the air outlet of the fan.

[0014] Preferably, an air inlet is provided on one side of the housing, and the air inlet end of the fan corresponds to the air inlet. A first limiting ring is fixedly connected to the end of the air inlet near the fan, and a second limiting ring is fixedly connected to the end of the air guide shroud near the fan. The ends of the first and second limiting rings near the opening of the housing are open. The inner diameter of the semi-circular part inside the first and second limiting rings matches the outer edge diameter of the air inlet end of the fan and the outer edge diameter of the air inlet of the fan, respectively. When the fan returns to its position, the outer edge of the air inlet end of the fan fits into the inside of the first limiting ring, and the outer edge of the air outlet of the fan fits into the inside of the second limiting ring.

[0015] Preferably, a limit rod is fixedly connected to the inner wall of the housing opposite to the opening, the bottom of the fan is slidably connected to the limit rod, the height of the limit rod is less than the depth of the housing, and the inside of the housing also has a drive component for driving the fan to extend out of the housing or return to its original position.

[0016] On the other hand, the present invention also provides a method for using a portable energy-saving electric fan, comprising the following steps: S1. When maintenance is required, the fan can be extended outward from inside the housing through the opening at the top of the housing. S2. After completing S1, at least one movable part of the fan casing is displaced relative to the fixed part so that the movable part is separated from the fixed part, thus creating a maintenance passage between the inside of the fan and the outside. S3. Insert the maintenance tools into the housing through the maintenance channel to perform maintenance operations on the inner wall of the housing and the impeller. S4. After the maintenance is completed, retract the fan into the housing; S5. When the fan is completely inside the housing, the moving parts are restricted by the blocking parts installed inside the housing, so that the moving parts and the fixed parts remain relatively fixed.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. The present invention can lift the fan out of the housing for easy maintenance, and can divide the fan housing into a fixed part and at least one movable part. The fixed part and the movable part can be connected without connecting parts, but only by the blocking parts in the housing to fix the movable part and the fixed part of the housing, which facilitates maintenance and return after maintenance.

[0018] 2. This invention, by incorporating an air guide hood with guide plates at various tilt angles in the air outlet channel, effectively disperses and directs the originally concentrated, high-speed airflow to different areas, creating a more diffused and gentler airflow field. This avoids the strong impact and discomfort caused by direct airflow onto the human body, making the airflow more natural and comfortable. It also improves the problem of excessively concentrated airflow in traditional fans. The air guide hood not only guides the airflow, but its structure itself also has a rectifying and buffering effect on the high-speed airflow generated by the fan. Combined with the air guide plates to disperse and guide the airflow, it reduces the eddies and howling caused by direct and violent collisions between the airflow and components such as grilles. This reduces the overall aerodynamic noise of the fan during operation from the source, creating a quieter environment.

[0019] 3. By setting up a lifting structure, the entire fan can be lifted out of the housing, providing a spacious area for maintenance. Its outer shell adopts a design with detachable movable and fixed parts, so there is no need to disassemble a large number of connecting parts during maintenance. The internal impeller and other components can be exposed by simple displacement or rotation. Combined with the easy-to-open housing door, cleaning, inspection and other maintenance work becomes extremely simple and quick.

[0020] 4. The present invention enables the electric or manual lifting of the fan within the housing through the built-in drive components (mainly including worm gear, drive block, etc.). When it needs to be moved, the fan can be completely stored in the housing, forming a flat and closed box-shaped structure, which is convenient for handling and the top can be used as a temporary carrying platform for stacking goods, greatly enhancing the overall mobility and space utilization value of the equipment.

[0021] 5. This invention eliminates the need for connecting parts between the moving and fixed parts. By using the first and second limiting rings inside the housing and the pressure ring on the door to form a blocking component, the moving parts are automatically limited and fixed from multiple directions after the fan returns to its position and the door is closed. This method ensures the integrity and sealing of the outer shell during operation and eliminates the need for disassembling the cumbersome connecting parts. The design is ingenious.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a perspective view of the present invention in use; Figure 2 This is a perspective view of the box door in the open state of the present invention; Figure 3 This is a perspective view of the maintenance status of the present invention; Figure 4 This is a perspective view of the fan of the present invention; Figure 5 This is a perspective view of Scheme 1 in the first category of the present invention; Figure 6 This is a perspective view of Scheme 2 in the first category of the present invention; Figure 7 This is a perspective view of Scheme 3 in the first category of the present invention; Figure 8 This is a perspective view of the second type of solution of the present invention; Figure 9 This is a perspective view of the air guide cover of the present invention; Figure 10 This is a perspective view of the housing of the present invention; Figure 11 This is a perspective view of the housing and fan of the present invention; Figure 12 This is a perspective view of the fan and drive assembly of the present invention; Figure 13 This is an exploded view of the worm gear of the present invention; Figure 14 This is a schematic diagram of the installation of the storage base of the present invention.

[0024] The accompanying figure is labeled as follows: 1. Housing; 2. Grille; 3. Fan; 4. Air outlet; 5. Outer shell; 6. Fixed part; 7. Moving part; 8. Impeller; 9. Door; 10. Slider; 11. Slide rail; 12. Air guide plate; 13. Air guide cover; 14. Air inlet; 15. First limiting ring; 16. Second limiting ring; 17. Pressure ring; 18. Limiting rod; 19. Worm gear; 20. Drive block; 21. Rotating groove; 22. Fixed column; 23. Synchronous pulley; 24. Synchronous belt; 25. Protrusion; 26. Spiral hole; 27. Drive rod; 28. Drive ball; 29. ​​Storage base. Detailed Implementation

[0025] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0026] Example 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this embodiment provides a portable energy-saving electric fan, including a housing 1 with a grille 2 and a fan 3 installed inside the housing 1. The air outlet of the fan 3 is aligned with the grille 2. The top of the housing 1 has an opening 4, through which the fan 3 can extend out of the housing 1. The outer casing 5 of the fan 3 is divided into a fixed part 6 and a movable part 7. The movable part 7 can be displaced relative to the fixed part 6. When the movable part 7 and the fixed part 6 are separated, the maintenance tools of the maintenance personnel can be inserted into the outer casing 5, thereby facilitating the maintenance of the inner wall of the outer casing 5 and the impeller 8.

[0027] The effects achievable by this embodiment include at least the following: the fan 3 can be lifted from the housing 1 for easy maintenance; and the outer casing 5 of the fan 3 can be divided into a fixed part 6 and at least one movable part 7, wherein the fixed part 6 and the movable part 7 can be connected without the use of connectors (such as bolts, clips, etc.). To fix the movable part 7 to the fixed part 6 during use, the following solution can be adopted: The housing 1 has a blocking component. When the fan 3 is completely inside the housing 1, the blocking component can fix the movable part 7 and the fixed part 6 relative to each other, so that the movable part 7 cannot move relative to the fixed part 6.

[0028] It should be noted that in the above scheme, although the outer shell 5 is not connected by a connector, this is because if a connector is used to connect the movable part 7 and the fixed part 6, it usually involves a whole circle around the outer shell 5, which is cumbersome to disassemble and assemble; however, the open opening 4 of the housing 1 is equipped with a door 9. The door 9 is first hinged to one end of the housing 1, and then further fixed to the housing 1 by a bolt (not shown in the figure). Only one bolt needs to be installed, so maintenance personnel can perform maintenance on the entire equipment by removing only one bolt.

[0029] As for the connection method between the active part 7 and the fixed part 6, one of the following schemes can be adopted: like Figure 5 , Figure 6 , Figure 7 The first category shown: A slider 10 is fixedly connected to one end of the movable part 7 near the fixed part 6. A groove 11 is provided at the corresponding position of the fixed part 6 and the slider 10. The slider 10 is slidably connected to the groove 11. The movable part 7 is located on the upper side of the outer shell 5 near the air inlet end of the fan 3.

[0030] like Figure 5 As shown, in the first category, the slider 10 slides along the axis of the impeller 8.

[0031] like Figure 6 As shown, in the first type of scheme 2: the slider 10 slides along the open opening 4 of the box 1.

[0032] like Figure 7 As shown, in Scheme 3 of the first type: the slider 10 slides obliquely upwards and outwards along the open opening 4 of the box 1.

[0033] like Figure 8 The second category shown: The movable part 7 is connected to the fixed part 6 by a hinge, specifically by a hinge or by a hinge shaft and a hinge sleeve. Preferably, the height of the hinge or the hinge shaft and the hinge sleeve is lower than the highest point of the outer shell 5, so as to facilitate the subsequent downward pressure and limiting of the movable part 7.

[0034] It should be noted that those skilled in the art can choose any of the four options mentioned above based on actual needs.

[0035] like Figure 9As shown, an air guide hood 13 is provided inside the housing 1 on one side of the grille 2. The cross-sectional area of ​​the air guide hood 13 increases towards the grille 2 (roughly trumpet-shaped). Several air guide plates 12 are distributed inside the air guide hood 13. The air guide plates 12 have different tilt angles, which can guide the air in different directions, so that the air is finally discharged from the grille 2. The shape of the end of the air guide hood 13 near the grille 2 matches the grille 2, and the shape of the end of the air guide hood 13 away from the grille 2 (that is, the end near the air outlet of the fan 3) matches the air outlet of the fan 3. The outer wall of the air guide hood 13 and the inner wall of the housing 1 are also reinforced to improve stability.

[0036] like Figure 1 As shown, an air inlet 14 is provided on one side of the housing 1, and the air inlet end of the fan 3 corresponds to the air inlet 14.

[0037] like Figure 10 , Figure 11 As shown, the blocking components in the above scheme include: a first limiting ring 15 fixedly connected to the air inlet 14 near the end of the fan 3 and a second limiting ring 16 fixedly connected to the air guide shroud 13 near the end of the fan 3. The ends of the first limiting ring 15 and the second limiting ring 16 near the opening of the housing 1 are open. The inner diameter of the semi-circular part inside the first limiting ring 15 and the second limiting ring 16 matches the outer edge of the air inlet end of the fan 3 and the outer edge diameter of the air inlet of the fan 3, respectively. When the fan 3 returns to its position, the outer edge of the air inlet end of the fan 3 is fitted with the inside of the first limiting ring 15, and the inner wall of the housing 1 can abut against the outer end of the air inlet end, so that the movable part 7 cannot move towards the air inlet 14, and the outer edge of the air outlet of the fan 3 is fitted with the inside of the second limiting ring 16.

[0038] In the above scheme, the first limiting ring 15 and the second limiting ring 16 can respectively limit the air inlet and air outlet of the fan 3.

[0039] like Figure 2 , Figure 3 As shown, the blocking component may also include a pressure ring 17 fixedly connected to the inside of the door 9. The pressure ring 17 may be made of rubber material. After the fan 3 returns to its original position and the door 9 is completely closed, the pressure ring 17 can press down the top of the outer casing 5, so that the fan 3 cannot move up and down, and in particular, it can limit the movement of the moving part 7.

[0040] It should be noted that in the above scheme, the fan 3 refers to the whole (including the motor that drives the impeller 8 to rotate, the housing 5 and the impeller 8), and the housing 5 refers to the housing 5 (including the moving part 7 and the fixed part). The motor of the fan 3 is an energy-saving motor.

[0041] Example 2: The technical solution of this example differs from that of Example 1 in that, as follows... Figure 11As shown, in this embodiment, a limiting rod 18 is fixedly connected to the inner wall of the housing 1 opposite to the opening 4. The bottom of the fan 3 is slidably connected to the limiting rod 18. The height of the limiting rod 18 is less than the depth of the housing 1. The interior of the housing 1 also has a drive assembly for driving the fan 3 to extend out of the housing 1 or return to its original position.

[0042] like Figure 8 , Figure 10 , Figure 12 , Figure 13 As shown, the drive assembly includes two worm gears 19 and drive blocks 20 fixedly connected to the two sides of the fan 3. The bottom of the worm gear 19 has a rotating groove 21. The inner wall of the housing 1 is fixedly connected to a fixed column 22. The worm gear 19 is rotatably connected to the fixed column 22 through the rotating groove 21 at its bottom. The cross-section of the fixed column 22 and the rotating groove 21 is T-shaped, so the worm gear 19 cannot detach from the fixed column 22. The two worm gears 19 rotate synchronously through the synchronous pulley 23 and the synchronous belt 24 at their bottom.

[0043] The timing pulley 23 can be a belt pulley or a sprocket, and the timing belt 24 can be a belt or a chain.

[0044] One way to drive the two worm gears 19 to rotate is to set a protrusion 25 on the top of one of the worm gears 19 that matches an electric / pneumatic screwdriver, so that the worm gear 19 cooperates with the drive block 20 to drive the drive block 20 and the fan 3 to extend out of the housing 1.

[0045] As another way to drive the two worm gears 19 to rotate: Based on the above, a spiral hole 26 is provided on the other worm gear 19 (near the side of the box door 9). Above the spiral hole 26 is a drive rod 27, and at the bottom of the drive rod 27 is a drive ball 28. The drive ball 28 can be engaged with the spiral groove in the spiral hole 26. So when the drive rod 27 is pressed down (and controlled to not rotate or rotate slightly), it can slide in the spiral hole 26 through the drive ball 28, thereby driving the worm gear 19 to rotate, and then driving the drive block 20 and the fan 3 to extend out of the box 1.

[0046] When the drive rod 27 moves upward (and is controlled to not rotate or rotate slightly), it can cause the worm gear 19 to flip, which in turn drives the drive block 20 and the fan 3 to retract into the housing 1.

[0047] Example 3: Figure 14 As shown, the technical difference between this embodiment and embodiment one is that, in order to prevent the drive rod 27 from being lost, this embodiment provides a storage base 29 that can be hinged and folded with the door 9. The drive rod 27 is slidably installed on one end of the storage base 29, and is configured such that when the storage base 29 is fully unfolded, the central axis of the drive rod 27 is coaxial with the central axis of the spiral hole 26.

[0048] Example 4: This example differs from Example 3 in that it provides a method for using a portable energy-saving electric fan, including the following steps: S1. Air supply and airflow optimization: During operation, the motor drives the impeller 8 to rotate, and air is drawn into the fan 3 through the air inlet 14 on the side of the housing 1. After being pressurized and accelerated by the impeller 8, the airflow is discharged from the outlet of the fan 3 and enters the air guide shroud 13. The air guide shroud 13 has a trumpet-shaped expansion structure facing the grille 2, and its interior is equipped with multiple air guide plates 12 with different tilt angles. These air guide plates 12 cut, guide, and redistribute the high-speed concentrated main airflow, dispersing the airflow into multiple airflows with different directions and relatively reduced speeds. After being rectified and diffused by the air guide plates 12, the airflow is finally delivered evenly and gently out of the housing 1 through the grille 2 with a matching shape at the outlet end of the air guide shroud 13, effectively avoiding direct strong winds, achieving comfortable air delivery, and reducing wind noise.

[0049] S2. Fan lifting and positioning principle: The bottom of the fan 3 is slidably connected to the limiting rod 18 inside the housing 1, guiding its vertical movement. The lifting power comes from the drive assembly. When the fan 3 needs to be raised for maintenance, the operator can drive the worm gear 19 to rotate in two ways: first, by using a tool to rotate the worm gear 19 with the protrusion 25 on top; second, by pressing down the drive rod 27 installed on the storage seat 29 of the housing door 9, causing the drive ball 28 at its bottom to embed into the helical hole 26 of the other worm gear 19. The downward movement of the drive rod 27 is converted into the rotational movement of the worm gear 19 through the ball-helical structure. The two worm gears 19 rotate synchronously through the synchronous pulley 23 and synchronous belt 24 at the bottom. The rotating worm gear 19 meshes with the drive block 20 fixed to the side of the fan 3, thus converting the rotational movement of the worm gear 19 into the vertical upward movement of the drive block 20 and the entire fan 3 along the limiting rod 18, until the fan 3 partially or completely extends out of the opening 4. The descent and return process follows the same principle but in the opposite direction.

[0050] S3. Principles for stable casing and easy disassembly: The outer casing 5 of the fan 3 is designed as a detachable structure consisting of a fixed part 6 and a movable part 7. In normal operation (returned position), the movable part 7 is not secured by traditional bolts, but rather by a set of "blocking components" inside the housing 1: the outer edge of the fan 3's air inlet is embedded in the first limiting ring 15 at the air inlet 14, while the inner wall of the housing 1 abuts against the outer end of the air inlet, restricting its movement towards the air inlet 14; the outer edge of the fan 3's air outlet is embedded in the second limiting ring 16 at the air guide shroud 13, achieving radial limitation; after the door 9 is closed, the pressure ring 17 on the inner side of the door 9 presses down, tightly abutting the top of the outer casing 5 (especially the movable part 7), restricting its vertical movement. These three components work together to securely lock the movable part 7 without the need for connecting parts.

[0051] When it is necessary to inspect the inside of the fan 3, first open the casing door 9 (to release the restriction of the pressure ring 17), and then raise the fan 3 by the drive assembly (to disengage it from the first limit ring 15 and the second limit ring 16). At this time, depending on the specific connection method between the movable part 7 and the fixed part 6 (such as the slide groove 11 / slider 10 or hinge), the movable part 7 can be easily slid or flipped open, thereby fully exposing the inside of the casing 5 and the impeller 8, which greatly facilitates the inspection and maintenance operation.

[0052] In summary, the present invention can lift the fan out of the housing for easy maintenance, and can divide the fan housing into a fixed part and at least one movable part. The fixed part and the movable part can be connected without connecting parts, but only by the blocking parts in the housing to fix the movable part and the fixed part of the housing, which facilitates maintenance and return after maintenance. By setting the air guide hood 13 with air guide plates 12 with multiple tilt angles in the air outlet channel, the originally concentrated and high-speed airflow can be effectively dispersed and directed to different areas to form a more diffuse and gentle air field. This avoids the strong impact and discomfort caused by direct airflow onto the human body, making the airflow more natural and comfortable. It also improves the problem of excessively concentrated airflow in traditional fans. The air guide shroud 13 not only guides the airflow, but its structure itself also has a rectifying and buffering effect on the high-speed airflow generated by the fan 3. Combined with the air guide plate 12 to disperse and guide the airflow, it reduces the eddies and howling caused by the direct and violent impact of the airflow with components such as the grille 2. This reduces the overall aerodynamic noise of the fan during operation from the source, creating a quieter environment. By setting up a lifting structure, the entire fan 3 can be lifted out of the housing 1, providing a spacious area for maintenance. Its outer casing 5 adopts a design with a detachable movable part 7 and a fixed part 6. During maintenance, there is no need to disassemble a large number of connecting parts. The internal impeller 8 and other components can be exposed by simple displacement or rotation. Combined with the easy-to-open housing door 9, cleaning, inspection, and other maintenance are easily facilitated. The maintenance work becomes exceptionally simple and quick. Through the built-in drive components (mainly including worm gear 19, drive block 20, etc.), the fan 3 can be electrically or manually lifted and lowered within the housing 1. When it needs to be moved, the fan 3 can be completely stored inside the housing 1, forming a flat and closed box-shaped structure, which is convenient for handling and the top can be used as a temporary carrying platform for stacking goods, greatly enhancing the overall mobility and space utilization value of the equipment. By eliminating the connecting parts between the moving part 7 and the fixed part 6, the blocking parts formed by the first limiting ring 15, the second limiting ring 16 inside the housing 1 and the pressure ring 17 on the door 9 are used to automatically limit and fix the moving part 7 from multiple directions after the fan 3 returns to its position and the door 9 is closed. This method not only ensures the integrity and sealing of the outer shell 5 during operation, but also eliminates the cumbersome steps of disassembling the connecting parts, which is a clever design.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0055] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A portable energy-saving electric fan, comprising a housing with a grille and a fan installed inside the housing, wherein the fan's air outlet is aligned with the grille, characterized in that: The top of the housing has an opening through which the fan can extend. The fan casing is divided into a fixed part and at least one movable part. The movable part is able to move relative to the fixed part. When the movable part and the fixed part are separated, maintenance tools can be inserted into the casing to inspect the inner wall of the casing and the impeller. The housing has a blocking component. When the fan is completely inside the housing, the blocking component can keep the moving part and the fixed part relatively fixed, preventing the moving part from moving relative to the fixed part.

2. A portable energy-saving electric fan as described in claim 1, characterized in that: A slider is fixed to one end of the movable part near the fixed part, and a groove is opened on the fixed part corresponding to the slider, and the slider is slidably connected to the groove.

3. A portable energy-saving electric fan as described in claim 2, characterized in that: The active part is located on the upper side of the casing near the air inlet.

4. A portable energy-saving electric fan as described in claim 3, characterized in that: The slider slides along the axis of the impeller.

5. A portable energy-saving electric fan as described in claim 3, characterized in that: The slider slides along the open opening of the box.

6. A portable energy-saving electric fan as described in claim 3, characterized in that: The slider slides diagonally upwards and outwards from the open opening of the box.

7. A portable energy-saving electric fan as described in claim 1, characterized in that: Inside the housing, an air guide hood is installed on one side of the grille. The cross-sectional area of ​​the air guide hood increases towards the grille, and the shape of the end closer to the grille matches the grille, while the shape of the end farther from the grille matches the air outlet of the fan.

8. A portable energy-saving electric fan as described in claim 7, characterized in that: An air inlet is provided on one side of the housing, and the air inlet of the fan corresponds to the air inlet. A first limiting ring is fixed to the end of the air inlet near the fan, and a second limiting ring is fixed to the end of the air guide shroud near the fan. The ends of the first and second limiting rings near the opening of the housing are open. The inner diameter of the semicircular part inside the first and second limiting rings matches the outer edge diameter of the air inlet of the fan and the outer edge diameter of the air inlet of the fan, respectively. When the fan is in place, the outer edge of the air inlet of the fan fits into the inside of the first limiting ring, and the outer edge of the air outlet of the fan fits into the inside of the second limiting ring.

9. A portable energy-saving electric fan as described in claim 1, characterized in that: A limit rod is fixed to the inner wall of the housing opposite the opening. The bottom of the fan is slidably connected to the limit rod. The height of the limit rod is less than the depth of the housing. The housing also has a drive assembly for driving the fan to extend out of the housing or return to its original position.

10. A method of using a portable energy-saving electric fan, employing a portable energy-saving electric fan as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. When maintenance is required, the fan can be extended outward from inside the housing through the opening at the top of the housing. S2. After completing S1, at least one movable part of the fan casing is displaced relative to the fixed part so that the movable part is separated from the fixed part, thus creating a maintenance passage between the inside of the fan and the outside. S3. Insert the maintenance tools into the housing through the maintenance channel to perform maintenance operations on the inner wall of the housing and the impeller. S4. After the maintenance is completed, retract the fan into the housing; S5. When the fan is completely inside the housing, the moving parts are restricted by the blocking parts installed inside the housing, so that the moving parts and the fixed parts remain relatively fixed.

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